Best 9 Flex Timers in 2026: Your Ultimate Workout Companion

Introduction

Hyrox Workout & Timer is the best flex timer alternative for distraction-free HYROX-style sessions. We tested 9 interval, HIIT, and functional fitness timers on iOS and Android during real workouts so you can pick the right one fast.

Quick comparison table

A scannable side-by-side view if you’re in a hurry:

App	Platform	Best for	Standout feature
Hyrox Workout & Timer	iOS	HYROX race and station workouts	Minimal, fade-into-background design
Seconds Pro Interval Timer	iOS	Fully customizable HIIT and circuits	Color-coded spoken intervals
SmartWOD Timer	Android	CrossFit and functional fitness	One-tap AMRAP, EMOM, For Time modes
Tabata Timer: Interval Timer	Android	High-intensity intervals	Huge digits, background music support
Box Timer - Workout Timer	iOS	Free boxing, HIIT, WOD sessions	Ad-free with non-interrupting beeps
Simple Interval Timer	iOS	Quick setups plus heart rate	Apple Watch integration
Gymboss Interval Timer	Android	Multi-phase trainer sequences	Digital version of classic stopwatch
Interval Timer - HIIT Workouts	iOS	Pure HIIT focus	Clean, no-frills visual design
WODster	Android	CrossFit timing and logging	Built-in daily workout recorder

1. Hyrox Workout & Timer

Best for: Athletes who want a purpose-built HYROX timer that vanishes during the effort.

Most flex timers pack in features and make your screen feel crowded. Hyrox Workout & Timer does the opposite: open it, pick a mode, tap start, and focus on your effort. No menus to swipe through mid-sweat, no ads, no account sign-up, and nothing extra. The layout follows the flow of a real HYROX race: station-based work blocks with rolling transitions. You tap the lap marker each time you finish a station to move on.

You can run the official race format, adjust a template, build a custom session from scratch (add stations, set meters, reps, or seconds, and reorder them), or load a saved training. Live distance tracking shows your pace on compatible segments, and you can pause, resume, skip, or undo without losing rhythm. After the workout, full split-time history appears automatically. The iPhone and Apple Watch sync smoothly: start on your wrist, glance at progress, tap the lap marker, and get your hand back on the ski or sled. Choose metric or imperial.

Standout features:

• Official HYROX race mode plus endless custom station workouts
• One-tap lap marker for instant station splits
• Background operation with audio cues that duck music, not pause it
• Apple Watch sync with active session mirroring and history
• Free for 4 sessions per month; upgrade for unlimited use

Get Hyrox Workout & Timer · Hyrox Workout & Timer on the App Store

2. Seconds Pro Interval Timer

Best for: Building intricate HIIT, Tabata, or circuit workouts with full audio guidance.

Seconds Pro lets you chain multiple interval blocks, each with its own color, duration, and alert, into one seamless session. The spoken cues announce what’s coming next, so you can keep your eyes on the floor or the bar. In a loud gym, the visual color shifts add an extra layer of clarity. If you enjoy programming precisely structured work/rest cycles, Seconds Pro gives you all the control.

3. SmartWOD Timer

Best for: CrossFitters and functional athletes who want dedicated modes, zero setup.

SmartWOD Timer removes guesswork with big-button screens for AMRAP, EMOM, For Time, and Tabata. The giant digits are readable across the room, and voice alerts count down and encourage you mid-set. It’s the timer you open three seconds before a WOD starts, not one you need to configure on the fly.

4. Tabata Timer: Interval Timer

Best for: Android users wanting a no-fuss, large-display HIIT timer.

This one keeps things simple: set work and rest periods, pick beep or vibration alerts, and go. The oversized numbers stay visible while you’re moving, and the app keeps running in the background with your playlist uninterrupted. Battery drain during long sessions is barely noticeable, which matters for extended circuit days.

5. Box Timer - Workout Timer

Best for: A completely free, ad-free timer that covers the basics without nagging.

Box Timer gives you count up, count down, and interval modes wrapped in a clean interface. The audio beeps never pause your music; they dip the volume momentarily, so momentum stays high. No ads, no in-app purchases. It’s rare to find a zero-cost timer that respects your attention this well during boxing rounds, HIIT blocks, or WODs.

6. Simple Interval Timer

Best for: Minimalists who want wrist-based heart rate without touching the phone.

Set your number of sets, action duration, and break time on one screen, then start. The Apple Watch integration shows your heart rate in real time and lets you control the timer from your wrist. It’s for those moments when you need a timer set in under ten seconds and refuse to fiddle with extra menus.

7. Gymboss Interval Timer

Best for: Trainers and athletes who rely on multi-phase sequences.

Gymboss replicates the feel of its celebrated physical stopwatch, handling complex chain intervals that move through different work/rest ratios in a single session. The interface is spartan but dependable, which is why coaching communities keep it loaded on their phones. It won’t interrupt your flow with pop-ups or unnecessary taps.

8. Interval Timer - HIIT Workouts

Best for: Locked-in circuit training where visual clutter is the enemy.

This app focuses purely on HIIT: set your exercise duration, rest period, and round count, then let the clean, high-contrast screen guide you. There are no extra modules to stumble into. When you need to stay mentally immersed in a tough circuit without visual noise, it delivers exactly the right amount of information.

9. WODster

Best for: Android CrossFit athletes who want timing and logging in a single app.

WODster pairs AMRAP and EMOM timers with a daily workout log so you can record scores immediately after the clock stops. Instead of juggling a timer and a separate notebook or app, you keep everything in one place. The progress tracking over weeks and months fills a gap that many standalone timers ignore entirely.

How we picked these apps

We ran each flex timer through real sessions: HYROX simulation races, 20-minute EMOMs, Tabata intervals, and traditional circuit rounds. The traits we scored hardest were simplicity, digit readability while moving, audio clarity that doesn’t interrupt your music, background playback, and platform availability. Apps that locked basic controls behind paywalls or stuffed the screen with ads didn’t make the cut. We also skipped timers that forced account creation unless the login earned its keep. Every pick works reliably with just a phone in your pocket, though a few earn bonus points for optional Apple Watch or wearable support.

Frequently asked questions

What’s a flex timer, and how is it different from a standard interval timer?

A flex timer handles adjustable work and rest patterns, like station-based HYROX transitions or rolling intervals, rather than fixed-length cycles. Standard interval timers typically loop one or two durations; flex timers let you vary effort types and lengths inside the same session.

Can I use these apps for HYROX training?

Yes, several support station-based and rolling start formats. Hyrox Workout & Timer is the only one purpose-built for the full HYROX race structure, with lap-based station splits and custom templates that mirror the event’s flow.

Which app works best while playing music?

Look for apps that duck audio instead of pausing it. In our testing, Hyrox Workout & Timer, Box Timer, and Tabata Timer: Interval Timer all lower music volume for cues, then bring it back without interruption.

Do any of these need a subscription?

Hyrox Workout & Timer offers a free tier with 4 sessions per month and an optional pro upgrade. Seconds Pro and Gymboss are one-time purchases. Box Timer and Simple Interval Timer are free. Others may have in-app purchases but don’t force recurring payments for essential functionality.

The verdict

Hyrox Workout & Timer is the standout flex timer alternative: built from the ground up for station-focused HYROX training without any feature bloat. It’s the only app that fully disappears while you work, letting you concentrate on performance. If flex-based workouts are your main training language, start here. Get Hyrox Workout & Timer and take the thinking out of your timer.